EMC E20-880 Actual Free Exam Questions & Community Discussion

You are working with a customer to design a VNX for Block solution for their SQL database. They currently have a CX4-480. In the past they have co-located their database and log files. In the new VNX design, the database will be placed in a FAST VP enabled pool. The transaction logs will be placed on a traditional RAID Group. Your customer needs help determining the number of IOPS they need to satisfy the needs of their transaction logs.
You know the following:
-Transaction period: 8 hours (business day) -Throughput during transaction period: 240 GB
How many IOPS will the transaction log volume require?

Refer to the exhibit.

A customer has three SAS DAEs configured with eight 4+1 RAID 5 Groups (RG) and six Hot Spares. All RGs are unused except for RG 0, which contains the Control LUNs. All LUNs except for those in RG 0 are the same size.
Which dvols will be selected for the second file system creation using Automatic Volume Management System-defined pools?

Your customer has a new VNX solution configured with Flash, SAS, and NL-SAS drives. The customer requires their DSS, VDI, Software Development, and Regulatory Compliance workloads to be distributed between the different drive types. Due to limited drive quantities only one workload type can be configured using Flash drives.
According to best practices, which configuration best assigns the workloads?

You are migrating a database on NFS to a new VNX. The customer notes that you have designated only SAS drives for the database transaction logs and not any Flash drives. The customer believes that the Flash drives will greatly increase transaction log performance.
What is the reason that you chose SAS drives?

A customer with a VNX for File system has a mix of Windows and Linux clients. The Storage Administrator wants to track and examine different types of correlated statistics for their file system read and write operations.
Which correlated statistic can accomplish this job?

Your customer has a new VNX solution configured with Flash, SAS, and NL-SAS drives. The customer requires their OLTP, VDI, Software Development, and Regulatory Compliance workloads to be distributed between the different drive types. Due to limited drive quantities only one workload type can be configured using Flash drives.
According to best practices which configuration best assigns the workloads?

A VNX Administrator is analyzing storage workload distribution. The administrator is trying to determine if the array has an acceptable skew. Based on the workload in the illustration, what could be concluded?

A Storage Administrator with a VNX Unified solution is using the CLI to monitor daily storage performance. They must type long commands to examine the statistical types and names to get the desired results. You have been asked to make statistical groups to accelerate and ease the demanded monitoring tasks.
Which command must be used to accomplish this job?

In VNX with MCx, if the Block compression rate is set to high, what is the initial compression bandwidth?

Your customer is migrating from a VNX to a VNX with MCx. Based on their workload, 16 KB constant prefetch sizes were configured on the VNX to improve performance. The customer wants to implement the same configuration on the VNX with MCx.
What is the smallest prefetch size on VNX with MCx?

A customer is supporting 800 Exchange users on a VNX5700. The users are divided among four Exchange storage groups using a total of eight LUNs each for data and logs and two LUNs for a cluster quorum disk and MSDTC. The company purchased a VNX5300 for its remote site. The company is using MirrorView/A with consistency groups to ensure consistent point-in-time recovery. The Exchange LUNs have been added to the consistency group, but the administrator is having trouble adding the quorum and DTC LUNs.
What should the administrator do?

A customer recently added a large number of new users to their VNX for Block storage system. They now complain that the system is slow. You have been asked to fix this problem.
Their configuration uses traditional LUNs exclusively. They have a number of Flash drives that are currently unused. Analysis of their application environment shows that several LUNs have skew > 90%.
Which technology would you implement to solve their performance problem?